| RefNo | RB/3/7/4 |
| Previous numbers | BL 7, no. 4 |
| Level | Item |
| Title | Unknown correspondent to Samuel Hartlib |
| Date | 20 and 26 January 1657 |
| Description | Scribal copy |
| Language | English, Latin |
| Extent | 2 leaves, fol. |
| Format | Manuscript |
| AccessStatus | Open |
| RelatedMaterial | Summarised in 'Correspondence', vol. 6, p. 421. For another copy see British Library Add MS 4365, fol. 365 |